Combination reciprocating and rotating tool



Dec. 6, 1949 L. LYNCH COMBINATION RECIPROCATING AND ROTATING TOOL Filed June 24, 1948 NVK/ENTOR:

L. L YNC'H Hl'fdlY/VEX Patented Dec. 6, 1949 UNITEDv COMBIATIONRECIPROCAT'ING 'AND ROTA-TING fTO'GL- Lawrence ijyrnhgftos nngeleaoauf.

Applicatiunuuneu, 194s,-=seriarNo.-s4,9ov

(olivi- 57) 11 Claims.

This invention relates to a power driven hand tool which is adapted for various V`purposes such as drilling, liling and sawing; or for peening.

It is the object of my invention' to yprovide a tool ofthe character referred towhichgmay quick ly and conveniently be adjusted to -suit the various operations for which it is adapted. It is afurther object of the invention to provide a tool of this class which may be readjusted bysimple manual operations and Without having to resort vto use of mechanical means for effecting such adjust' ments.

These and other objects of the invention will be better understood from the 'followingA detail description and reference `is invited to the accom panying drawings in which a preferred" form" of the invention is illustrated.

In the drawings:

Fig. 1 is a side view partly in section of a device embodying the invention;

Fig. 2 is a view of the main portion of the device taken at right angles to Fig. 1;

Fig. 3 is a cross-sectionalend' view takenv subi stantially on line 3 3 of Fig. 1; and

Figs. 4'and 5 illustrate elements of thedevce, the importan-ce of which is hereinafter'fullyrex plained.

As indicated in theV drawings, the tool ofmy invention includes generally a cylindrical. body portion I, within which a driving. member 'Z-is rotatablyfitted and a stem 3 extends axially through this member and the body of thetolfo'r rotating or reciprocating movement tl'i'ere'o'ng-4 according to the condition of adjustmentrthereof, the rear end of the driving membei'is -shvviiJ- irif`- ternally threaded to receive a flexible shaftlll, such as conventionally used in toolsof this type.

As shown in Fig. 1, peripheral cani! grooves l5, 5 of different pitch are cut into 4'the ste"3 -ofa size to receive a ball 'I Which normally is heldicoi' rectly positioned Within one of the grooves-by means which will be described presentlyi Inf addition to the cam grooves just referredt, alrecess 8 is axially cut into the 'stemof asizetf're'- ceive a second ball 9 and the latter is similarly maintained in -correct position within this recess by means which will now'be described.l

A recess I5 is cut into the periphery :of the tool body at right angles to the -axis thereof of a size to .receive therein a block I6, the inner surfacefo'f which is recessed fittingly lto receive v4theb'all 9, and the block is above this recess shown perf'at ed to receive the inner end of fa paw-l |85 The latter is lmounted for oscillating movement -with= in a groove of the body by means\ofa.-=pivot -|9 andA it fitted-with-anger piece 2 0, the outer surface of rwhichy corresponds to the peripheral outline of the body. Y A compression spring 2| is placed within this finger piece normally to maintainthe block- I6 in the position indicated in Fig. 3 and -this spring is conveniently maintained in position by means of a lip 22 lwhich projects inwardly yfrom the inner surface of the finger piece. It is seen fromthe foregoing brief description that the stem 3- is held against rotation Vby the ball 9k ridingff-in the groove 8, but that it is free to move -axially within the tool body.

Asthe-ball isrmaintained in position within the toolbody so the ball l is held in position Withinthe driving member 2 in the following manner. A lrecess 25 is sunk in the periphery of this member-of a size to receive therein a block 25 which maybe very similar to the above described block IEand which is similarly recessed at the bottom thereof to receive the ball 1. A pawl 21 is mounted within the driving member on a pivot 28 and the inner end of this pawl engages a perforation 29 `of the block 25 in a manner similar to that in which the pawl I8 engages the perforation of the block I6; The paw] is fitted with a nger piece il!)N which extends in continued alignment With the pawl and substantially in axial relation to the driving member. A spring 3| urges the pawl into the position indicated in Fig. l to maintain the ball 'l correctly seated-within the cam groove 6 of thest'enfi.

The body portion of the tool is made with a shallow groovein the periphery thereof, within which an outershell 3.2 is fitted for rotatory movement therein'. It is important to note that the shell, asbest indicated in Fig. 3, clears the linger piece 2|) lof the 'pawl I8 so as to leave the spring 2| 'free-to seat the ball' as required in order to maintain the ball correctly seated within the groove fof thel stem.

It should be clear from the foregoing brief description `that rotation of the driving member is, by the'ball "I within the cam groove 6, translated into a'reciprocating movement of the stem of the length required for ling or sawing operations and that the ball S, riding within the groove 8, maintainsfthe'stemV unturned during the reciprocations thereof.

As above stated, -a second cam groove 5 is sunk into Vthe periphery of the stem and this cam groove is designed to impart tothe stem shorter reciproeating-movement such as required for peening operations.' In order to utilize this second cam groove. it becomes necessary to transfer the ball 'Itfroni--the 'cam-groove Vli thereinto. For the purpose of such transfer, it is merely required to turn the outer shell 32 on the body portion of the tool until the opening 33 of this shell reaches the position indicated in Fig. 2, wherein the finger piece 30 of the pawl 26 is shown fully exposed. While in this position, it is merely required manually to depress the nger piece, thereby to cause the ball I to rise out of the cam groove 6. The stem 3 is then moved axially until the pawl reaches the position to register with the cam groove 5. Pressure on the finger piece 30 may then be released whereupon the spring 3l will seat the ball in this second groove. The outer shell may then be returned to its initial position to lock the parts in the correct position, as required for the operation of the tool. For convenience in performing this adjustment, the stem may be tted with graduations for registration with the front face of the tool body, as indicated in Fig. 1, the letters P R and S pointing to the location of these lines which indicate these positions. The two cam grooves should be sufficient for most peening and sawing operations, but additional grooves may be added if required.

It was above stated that one of the objects of the invention is to adapt the tool for drilling purposes also and such adjustment may be effected by releasing the ball 1 from the cam groove 6 of Fig. 1, in the manner above described and by pushing the stem 3 further into the tool until the ball 9, which at the same time has been elevated by depressing the nger piece 20, registers with the outer peripheral surface of the stem 3 beyond the end of the groove 8 and the ball 'I at the same time reaches the position of registration with this groove. When the outer shell now is returned to its initial closing position, it is seen that the stem is held by the ball 'I against rotation relative to the driving member, but that both are free to rotate within the tool body, as required for the purpose of performing drilling operations. A drill chuck 35 may then be mounted in position on the threaded end of the stem. The latter is also shown recessed in the end thereof to receive the shank of a file or saw and a set screw 36 is provided for the purpose of locking such tool in position therein.

When the balls 1 and 9 are carefully and tightly tted within their sockets in their blocks I6 and 25, and when a heavy grease has been applied to the stem, as is practice With tools of this kind, it is found that the ball will be held firmly within its socket when it is raised out of its groove. Should it, however, be found that due to improper lubrication or otherwise, a danger would be present of the ball not remaining within the block when'elevated from its groove, it is possible to provide means for tying the ball to the pawl which elevates the block. Such means is, in Fig. 5, shown to comprise a stud 31 which projects downward from the block 26 and extends through a perforation of the ball. This perforation should be slightly countersunk at the bottom and the end of the stud slightly spread so as to lock 'the ball in position thereon. When so mounted, it is found that the ball will be positively elevated and yet will be free to rotate on the stud, as required during the operation of the tool. It is to be understood that a similar stud 38 is provided to lock the ball 9 in position Within its socket in the block I6, as indicated in Fig. 4.

The body of the tool is shown made in three parts i9, II and I2, the adjoining ends of which are provided with screw threads for the purpose of drawing the three parts together after the outer shell 32 has been placed in position on the central member II. It is also to be noted that suitable roller or pin bearings I3, I4 may be placed between the driving member and the body member I I for the purpose of eliminating friction between these parts and it may be well, in addition, to provide a thrust bearing 23 further to eliminate friction between these parts. Other modifications may be embodied within the scope of the claims hereto appended.

I claim:

1. A tool reciprocating device comprising, a casing, a cylindrical stem mounted for axial movement within the casing but held against rotation therein, cam grooves in said stem of diiferent pitch, a ball for engagement with any one of said cam grooves, and a support for said ball, said support being manually operable to withdraw the ball from its groove, the stem being axially movable to bring another groove into registration with the ball.

2. A tool reciprocating device comprising, a casing, a cylindrical stem mounted for axial movement within the casing but held against rotation therein, cam grooves in said stem of different pitch, a ball for engagement with any one of said cam grooves, a ball support, and a lever engaging said support, the lever being manually movable to raise the support to withdraw the ball from its groove, the stem being axially movable to bring another groove into registration with the ball.

3. A tool reciprocating device comprising, a casing, a cylindrical stem mounted for axial movement within the casing but held against rotation therein, cam grooves in said stem of dierent pitch, a ball for engagement with any one of said cam grooves, a ball support, a lever engaging said support, and a spring urging movement of the lever to press the ball into the groove, the lever being manually movable against the tension of said spring to raise the support to draw the ball from its groove, the stem being axially movable to bring another groove into registration with the ball.

4. A tool reciprocating device comprising, a casing, a cylindrical stem mounted for axial movement within the casing but held against rotation therein, cam grooves in said stem of diierent pitch, a ball for engagement with any one of said cam grooves, a support for said ball, and a spring urging said support inward to press the ball into the groove, said support being manually operable against the tension of said spring to withdraw the ball from its grove, the stem being axially movable to bring another groove into registration with the ball.

5. A tool reciprocating device comprising, a casing, a cylindrical stem mounted for axial movement within the casing but held against rotation therein, cam grooves in said stem of diierent pitch, a ball for engagement with any one of said cam grooves, a support for said ball, said support being manually operable to withdraw the ball from its groove, the stem being axially movable to bring another groove into registration with the ball, and means for anchoring the ball in the support for rotation therein.

6. A tool reciprocating device comprising, a casing, a cylindrical stem mounted for axial movement within the casing but held against rotation therein, cam grooves in said stem of different pitch, a ball for engagement with any one of said cam grooves, a ball support, a lever engaging said support, the lever being manually movable to raise the support to withdraw the ball from its groove,

the stem being axially movable to bring another groove into registration with the ball, and means' for anchoring the ball for rotatory movement within the support.

'7. A tool reciprocating device comprising a cylindrical casing, a cylindrical stem axially movable within said casing, cam grooves in said stem of diierent pitch, a ball, a support for said ball, a spring urging movement of said support to seat said ball in one oi said grooves, the support being manually movable against the tension of said spring to Withdraw the ball from its gr-oove, the stem being axially movable to bring another groove into registration with the ball, an axially directed groove in the stem, and a ball in said groove preventing rotation of the stem.

8. A tool reciprocating device comprising, a cylindrical casing, a cylindrical stem mounted for axial movement within the casing but held against rotation therein, cam grooves in said stem oi different pitcn, a ball for engagement with any one of said cam grooves, a support for said ball, and a cylindrical sleeve rotatably encompassing the casing and having an opening for registration with said support, the support being manually operable to withdraw the ball from its groove when the sleeve opening is brought into registration therewith, the stem being axially movable to bring another groove into registration with the ball.

9. A tool reciprocating device comprising, a casing, a cylindrical stem mounted for axial movement Within the casing but held against rotation therein, cam grooves in said stem or" diierent pitch, a ball for engagement with any one of said cam grooves, a ball support, a lever engaging said support, and a cylindrical sleeve rotatably encompassing the casing and having an opening for registration with said lever, the lever being manually movable to raise the support to Withdraw the ball from its groove when the sleeve opening is 6 brought into registration therewith, the stern being axially movable to bring another groove into registration With the ball.

10. A tool rotating and reciprocating device comprising, a cylindrical casing, a cylindrical stern mounted for axial movement Within the casing, a cam groove in said stem, a ball rotatably seatable in said groove, an axially directed groove in the stem, a ball seated therein, supports for said balls, and a cylindrical sleeve encompassing the casing and having an opening therein for registration with said supports, the latter being manually operable to liit the balls from their grooves, the 1stem being axially movable to bring the axial groove into registration with said cam groove ball and the second ball out of said axial groove.

11. A tool rotating and reciprocating device comprising, a cylindrical casing, a cylindrical stem mounted for axial movement within the casing, cam grooves in said stem of different pitch, a ball rotatably seatable in any one of said grooves, an axially directed groove in the stem, a ball seated therein, supports for said balls, and a cylindrical sleeve encompassing the casing and having an opening therein for registration with said supports, the latter being manually operable to lift the balls from their grooves, the stem being axially movable to bring the axial groove into registration with said cam groove ball and the second ball out of said axial groove.

LAWRENCE LYNCH.

REFERENCES CITED rIhe following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,866,529 Farkas July 12, 1932 2,121,831 Simmons June 28, 1938 

